发明申请
- 专利标题: TUNER MODULE
- 专利标题(中): 调谐器模块
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申请号: US12621883申请日: 2009-11-19
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公开(公告)号: US20100130148A1公开(公告)日: 2010-05-27
- 发明人: Eiichi Sano , Tomonori Nakajima
- 申请人: Eiichi Sano , Tomonori Nakajima
- 申请人地址: JP Tokyo
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JP Tokyo
- 优先权: JP2008-303000 20081127; JP2009-213485 20090915
- 主分类号: H04B1/18
- IPC分类号: H04B1/18
摘要:
A tuner module includes a filter that reduces the signal level outside the frequency band of a selected channel in an input RF signal of terrestrial television broadcasting, a local oscillation circuit that oscillates a local oscillation signal, a mixing circuit that mixes the RF signal in which the signal level outside the frequency band of the selected channel is reduced by the filter and the local oscillation signal oscillated by the local oscillation circuit to downconvert the RF signal to an intermediate frequency signal, and a control circuit that controls the local oscillation frequency of the local oscillation signal oscillated by the local oscillation circuit. The control circuit adjusts the local oscillation frequency to a value that suppresses an effect of a disturbance wave from other channels within a frequency band of the intermediate frequency signal of the selected channel.
公开/授权文献
- US08185071B2 Tuner module 公开/授权日:2012-05-22
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